Stent graft

Abstract

The present invention relates to a stent graft. The stent graft comprises a first component, a second component adjacent to the second component, and a fixing member connected between the first component and the second component, the fixing member comprises a first winding portion, a second winding portion, and a first reinforcing portion connected between the first winding portion and the second winding portion, the first winding portion and the second winding portion are wound around the first component and the second component, and the first reinforcing portion clamps the wire of the fixing member located inside the first reinforcing portion. The fixing member in the stent graft connects the first component and the second component to each other, so that the first component and the second component will not be separated from each other, and the fixing member will not damage the first component and the second component.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a stent graft. Background Art

[0002] With the improvement of people's living standards and changes in lifestyles, the incidence of vascular diseases is increasing. If these diseases are not treated in time, they may lead to vascular blockage, aneurysm and other diseases, which will seriously endanger human life safety. Currently, covered stents are commonly used to treat these diseases. Covered stents are formed by multiple corrugations. If two adjacent corrugations are connected by welding, the welding method is easy to damage the corrugations due to the high temperature. Summary of the invention

[0003] Based on this, the present application provides a coated stent, in which a fixing member connects a first component and a second component to each other, so that the first component and the second component will not be separated from each other, and the fixing member will not damage the first component and the second component.

[0004] The coated support includes a first component, a second component adjacent to the second component, and a fixing member connected between the first component and the second component, the fixing member includes a first winding portion, a second winding portion, and a first reinforcement portion connected between the first winding portion and the second winding portion, the first winding portion and the second winding portion are wound around the first component and the second component, and the first reinforcement portion clamps the wire thread of the fixing member located inside the first reinforcement portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 A schematic diagram of the structure of the stent graft provided in the first embodiment of the present application;

[0006] Figure 2 for Figure 1 The enlarged schematic diagram of point I in the middle;

[0007] Figure 3 This is a schematic structural diagram of a fixing member in the first embodiment of the present application;

[0008] Figure 4a This is a schematic diagram of the structure in which the first winding portion winds around the first component and the second component in the first embodiment of the present application;

[0009] Figure 4b This is a structural schematic diagram of the second winding portion winding the first component and the second component in the first embodiment of the present application;

[0010] Figure 4c This is a schematic diagram of the structure in which the fixing member is wrapped around the first component and the second component in the first embodiment of the present application;

[0011] Figure 4d for Figure 4cThe enlarged schematic diagram of II in the middle;

[0012] Figure 5 A schematic diagram of the structure of a stent graft provided in other embodiments of the present application;

[0013] Figure 6a This is a schematic diagram of the structure in which the fixing member is wrapped around the first component, the second component and the third component in the second embodiment of the present application;

[0014] Figure 6b for Figure 6a The enlarged schematic diagram of the III in the middle;

[0015] Figure 7 This is a schematic diagram of the structure in which the fixing member is wrapped around the first component and the second component in the third embodiment of the present application;

[0016] Figure 8 A schematic diagram of the structure of a stent graft provided in a fourth embodiment of the present application;

[0017] Fig. 9 A schematic diagram of the structure of a stent graft provided in the fifth embodiment of the present application;

[0018] Fig.10 A schematic diagram of the structure of the coated stent provided in the sixth embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0021] In the field of interventional medical devices, the “distal end” is defined as the end away from the operator during surgery, and the “proximal end” is defined as the end close to the operator during surgery. “Axial” refers to the direction parallel to the line connecting the distal and proximal centers of the medical device, and “radial” refers to the direction perpendicular to the above axial direction.

[0022] In this embodiment, the stent graft is a stent graft. In other embodiments, the stent graft is not limited to other medical devices such as occluders and venous filters.

[0023] See also Figure 1 and Figure 2 The stent graft 1 includes a first component 11 and a second component 12 adjacent to the first component 11. In this embodiment, the first component 11 and the second component 12 are both corrugations of the stent graft.

[0024] It can be understood that in other embodiments, the first component 11 can also be a developing component, the second component 12 can also be a corrugation of the stent graft, and the fixing component 15 fixes the developing component to the corrugation of the stent graft. Alternatively, the first component 11 can also be a corrugation, and the second component 12 can also be a tubular coating 16 on the surface of the stent graft.

[0025] The stent graft 1 comprises a proximal end 10a and a distal end 10b opposite to the proximal end 10a. The stent graft 1 is a hollow tubular structure. The first component 11 is relatively far from the distal end 10b of the stent graft 1 from the second component 12.

[0026] The coated stent 1 also includes a fixing part 15. The fixing part 15 is connected between the first component 11 and the second component 12. The fixing part 15 connects the first component 11 and the second component 12 to each other so that the first component 11 and the second component 12 will not be separated from each other. The fixing part 15 is formed by winding an annular coil between the first component 11 and the second component 12. The fixing part 15 is not limited to being made of a polymer material. In the present embodiment, the fixing part 15 is made of polytetrafluoroethylene (PTFE). The first component 11 and the second component 12 are nickel-titanium wires. The fixing part 15 winds and connects the first component 11 and the second component 12 without damaging the first component 11 and the second component 12.

[0027] See also Figure 3 In this embodiment, the fixing member 15 is in a long strip shape in a natural state. The fixing member 15 is folded in half so that the two opposite ends of the fixing member 15 are close to each other, wrapped and bound, and a fixing portion 151 is formed. The fixing member 15 also includes a first portion 152 and a second portion 153, and the fixing portion 151 is connected between the first portion 152 and the second portion 153. The first portion 152, the second portion 153 and the fixing portion 151 are integrally formed. That is, the first portion 152, the second portion 153 and the fixing portion 151 are connected to each other, so that the first portion 152, the second portion 153 and the fixing portion 151 are coils connected head to tail.

[0028] See also Figures 4a to 4dIn this embodiment, the fixing portion 151 is disposed near the first component 11. Specifically, the fixing portion 151 is disposed on a side of the first component 11 near the proximal end 10a of the stent graft 1. After the stent graft 1 is implanted in the human body, blood flows from the distal end 10b to the proximal end 10a, and the first portion 152 can resist the impact of part of the human body's blood on the fixing portion 151, reducing the risk of the fixing portion 151 being impacted by the blood and falling off. In other embodiments, the fixing portion 151 can also be disposed near the second component 12.

[0029] In this embodiment, the fixing member 15 includes a first winding portion 154 and a second winding portion 155 connected to the first winding portion 154. The first winding portion 154 is connected to the fixing portion 151. Specifically, the first portion 152 and the second portion 153 form the first winding portion 154 on the first component 11 and the second component 12 in a first winding manner. The first winding portion 154 brings the first component 11 and the second component 12 closer to each other. Figure 4a The first winding method means that, in the left view (i.e., looking from the left side of the coated stent 1 to the right side of the coated stent 1), the first part 152 and the second part 153 are wound in a clockwise direction (i.e., along z1 in the figure).

[0030] Afterwards, the first portion 152 and the second portion 153 pass between part of the first portion 152 and part of the second portion 153 near the fixing portion 151, and then form a second winding portion 155 on the outer wall of the first component 11 and the outer wall of the second component 12 in a second winding manner. The second winding portion 155 and the first winding portion 154 are arranged in sequence in the positive direction of the X-axis. Among them, the second winding method means that in the left view (i.e., from the left side of the coated support 1 to the right side of the coated support 1), the first portion 152 and the second portion 153 are wound in a counterclockwise direction. The second winding portion 155 brings the first component 11 and the second component 12 closer to each other. The second winding method is opposite to the winding direction of the first winding method.

[0031] The fixing member 15 includes a first reinforcing portion 156. The first reinforcing portion 156 is connected between the first winding portion 154 and the second winding portion 155. The first reinforcing portion 156 is wound around the first winding portion 154 and the second winding portion 155, so that the structure of the first reinforcing portion 156 and the first winding portion 154 is compact. And the first reinforcing portion 156 clamps the wire of the fixing member 15 located inside the first reinforcing portion 156. At the same time, the first reinforcing portion 156 makes the adjacent first winding portion 154 and the second winding portion 155 close to each other, improves the connection strength between the two adjacent winding portions, and makes the first component 11 and the second component 12 firmly connected.

[0032] The fixing member 15 includes a third winding portion 159, and the third winding portion 159 is arranged at intervals with the second winding portion 155. The first winding portion 154, the second winding portion 155 and the third winding portion 159 are arranged in sequence in the X-axis direction. The fixing member 15 also includes a second reinforcing portion 157. The number of the second reinforcing portions 157 is one or more. In this embodiment, the number of the second reinforcing portions 157 is two. The second reinforcing portion 157 connects the adjacent second winding portions 155 and the third winding portions 159. The second reinforcing portion 157 close to the first reinforcing portion 156 squeezes the first reinforcing portion 156, so that the structure between the second reinforcing portion 157 and the first reinforcing portion 156 is compact. Two adjacent second reinforcing portions 157 abut against each other, so that the structure between the two adjacent second reinforcing portions 157 is compact. It can be understood that the third winding portion 159 and the second winding portion 157 are exactly the same. The number of the third winding portion 159 is one or more, and the number of the second winding portion 155 is one or more. In other embodiments, the third winding portion 159 is different from the second winding portion.

[0033] See also Figure 4c In this embodiment, at least a portion of the end 152a of the first portion 152 and at least a portion of the end 153a of the second portion 153 pass through the second winding portion 155 and abut against the second reinforcing portion 157. In this embodiment, the end 152a of the first portion 152 and the end 153a of the second portion 153 are connected to the second reinforcing portion 157 farthest from the first reinforcing portion 156. In this embodiment, the end 152a of the first portion 152 and the end 153a of the second portion 153 are flush with the side of the second reinforcing portion 157. In other embodiments, the end 152a of the first portion 152 and the end 153a of the second portion 153 cover the second reinforcing portion 157.

[0034] See also Figure 4c and Figure 4d In this embodiment, the opening direction of the first reinforcing portion 156 is along the positive direction of the Y axis, and the opening direction of the second reinforcing portion 157 is also along the positive direction of the Y axis. That is, the opening direction of the first reinforcing portion 156 is the same as the opening direction of the second reinforcing portion. The opening direction of the first reinforcing portion 156 is toward the first component 11, and the opening of the second reinforcing portion 157 is also toward the first component 11.

[0035] In this embodiment, the mutually abutting parts of the fixing member 15 can be bonded. The fixing part 151 is a polymer material, and after being heated, the inside of the fixing part 151 is bonded to each other. The part of the fixing part 151 abutting against the first reinforcing part 156 is bonded tightly to the first reinforcing part 156. The part of the first reinforcing part 156 abutting against the second reinforcing part 157 is bonded tightly to the second reinforcing part 157. The parts of the two adjacent second reinforcing parts 157 abutting against each other are bonded tightly to each other. The end 152a of the first part 152 and the end 153a of the second part 153 are bonded tightly to the second reinforcing part 157. This will increase the connection strength between the fixing member 15 and the first component 11 and the second component 12 as a whole, so that the first component 11 and the second component 12 will not fall off easily.

[0036] In this embodiment, the projections of the fixing portion 151, the first reinforcing portion 156, and the second reinforcing portion 157 on the cross section perpendicular to the first component 11, that is, the projection of the first reinforcing portion 156 on the radial cross section of the tubular coating, fall within the projection of the first component 11 on the cross section. Figure 4c In the figure, the projection of the fixing part 151, the first reinforcing part 156, and the second reinforcing part 157 along the positive direction of the Y axis onto the first component 11 falls into the first component 11. The first component 11 can resist the impact of blood on the fixing part 151, the first reinforcing part 156, and the second reinforcing part 157, and prevent the fixing part 151, the first reinforcing part 156, and the second reinforcing part 157 from being impacted by blood in the human body and being easily loosened.

[0037] Please refer again Figure 1 In this embodiment, the coated stent 1 also includes a tubular coating 16. The material of the tubular coating 16 is close to or the same as the material of the fixing member 15. In this embodiment, the tubular coating 16 is a double-layer structure, and the fixing member 15 and the first component 11 are wrapped in the two-layer structure of the tubular coating 16. The tubular coating 16 and the fixing member 15 are mutually supported and fitted, so that the structure of the fixing member 15 and the first component 11 is more compact and stable. In other embodiments, the tubular coating 16 may be a single-layer structure, and the tubular coating 16 supports the first component 11 and is bonded to the fixing member 15.

[0038] In this embodiment, the crest of the first component 11 is opposite to the trough of the second component 12. The first component 11 is contained in the tubular coating 16, part of the second component 12 is contained in the tubular coating 16 (that is, part of the second component 12 is exposed outside the tubular coating 16), and the fixing member 15 is contained in the tubular coating 16. The second component 12 can be supported by the fixing member 15 and rotate relative to the first component 11. The first component 11 and the second component 12 can rotate with each other to improve the flexibility of the stent graft 1. In this embodiment, the second component 12 is entirely arranged outside the tubular coating 16, and the trough of the second component 12 is covered by the tubular coating 16. The fixing member 15 is entirely contained in the tubular coating 1. That is, the fixing member 15 is not exposed outside the stent graft 1, and after the stent graft 1 is implanted in the human body, it can prevent the fixing member 15 from being easily loosened by the impact of blood. In other embodiments, all of the first component 11, the second component 12 and the fixing member 15 are contained in the tubular coating 16. The first component 11 and the second component 12 are not easily separated from each other under the restriction of the tubular coating 16 and the fixing member 15 , and the first component 11 and the second component 12 can rotate relative to each other, thereby improving the flexibility of the coated stent 1 .

[0039] In this embodiment, after the stent graft 1 is released in the human body, the second component 12 directly abuts against the inner wall of the human blood vessel or organ. The first component 11 and the second component 12 are connected by a fixing member 15. The second component 12 can be supported by the fixing member 15 and rotate relative to the first component 11 to adapt to the human body and improve the fit between the second component 12 and the human body. In this embodiment, the first component 11 and the second component 12 have the same shape. In other embodiments, please refer to Figure 5 , the first component 11 and the second component 12 have different shapes. For example, the number of crests and troughs of the first component 11 is greater than that of the second component 12. After the stent graft 1c is implanted into the inner wall of the human body, the contact area between the first component 11 and the inner wall of the human body can be increased, and the friction between the first component 11 and the inner wall of the human body can be increased, so that the first component 11 is not easy to shift.

[0040] Second embodiment

[0041] See also Figure 6a and Figure 6b The stent graft 1a provided in the second embodiment is substantially the same as that in the first embodiment, except that the stent graft 1a further comprises a third component 13a. In this embodiment, the third component 13a is a developing ring. The fixing member 15a connects the first component 11a, the second component 12a, and the third component 13a together.

[0042] In this embodiment, after the first winding portion 154a of the first part (not shown) and the second part (not shown), the first winding portion 154a passes through the connection 158 between the first part and the second part, and then is wound on the outer wall of the first component 11a, the outer wall of the second component 12a, and the outer wall of the third component 13a in a second winding manner to form a second winding portion 155a. The first part and the second part are both made of polymer materials, and the friction between the first part and the second part is small, which is easier to loosen than the first part and the second part being wound into a node. In this embodiment, the connection 158 between the first part and the second part will not loosen, and the connection strength is greater.

[0043] In this embodiment, the first winding portion 154a and the second winding portion 155a are arranged at intervals. That is, in the X-axis direction, the first winding portion 154a, the second winding portion 155a, and the first winding portion 154a are arranged in sequence. In this embodiment, the number of the first winding portion 154a is two, and the number of the second winding portion 155a is one. In other embodiments, the number of the first winding portion 154a can be one or more, and the number of the second winding portion 155a can be one or more. The specific method is to be able to firmly connect the first component 11a and the second component 12a.

[0044] In this embodiment, the first reinforcing portion 156a is connected between the first winding portion 154a and the second winding portion 155a. The first reinforcing portion 156a binds the adjacent second winding portion 155a and the first winding portion 154a, so that the second winding portion 155a and the first winding portion 154a are not easily loosened. In other embodiments, the first reinforcing portion 156a is one or more.

[0045] In this embodiment, the fixing member 15a further includes a second reinforcing portion 157a, which is adjacent to the first reinforcing portion 156a. The second reinforcing portion 157a and the adjacent first reinforcing portion 156a are staggered and mutually abut and squeeze each other, so that the adjacent second reinforcing portions 157a and the first reinforcing portions 156a are more closely fitted.

[0046] In this embodiment, the opening direction of the second reinforcing portion 157a is opposite to that of the first reinforcing portion 156a. Specifically, in the positive direction of the X-axis, the opening direction of the first reinforcing portion 156a is along the positive direction of the Y-axis. The opening direction of the second reinforcing portion 157a is along the negative direction of the Y-axis. In this embodiment, the number of the second reinforcing portion 157a is one or more.

[0047] In this embodiment, the fixing member 15a further includes a third winding portion 159a. The third winding portion 159a is formed by winding only the first portion on the outer wall of the first component 11a, the outer wall of the second component 12a, and the outer wall of the third component 13a in a second winding manner.

[0048] In this embodiment, the end of the second portion is repeatedly wrapped and bound with the end of the first portion to form a fixing portion 151a. The fixing portion 151a is disposed on a side of the second wrapping portion 155a away from the second wrapping portion 155a.

[0049] The projections of the fixing portion 151a, the first reinforcement portion 156a, and the second reinforcement portion 157a in the direction parallel to the axial direction and toward the distal end fall onto the outer surface of the first component 11a. The first component 11a can resist the impact of blood on the fixing portion 151a, and prevent the fixing portion 151a, the first reinforcement portion 156a, and the second reinforcement portion 157a from being impacted by blood in the human body and being easily loosened.

[0050] In this embodiment, the material of the fixing member 15a is polyester. In other embodiments, the material of the fixing member 15a is PTFE or other polymer materials.

[0051] It can be understood that in other embodiments, the tubular coating of the coated stent 1a covers the first component 11a, the second component 12a, the third component 13a and the fixing member 15a, and the tubular coating is tightly fitted with the fixing member 15a. In other embodiments, after the tubular coating covers the first component 11a, the second component 12a, and the third component 13a, the fixing member 15a is used to sew the third component 13a to the outer surface of the tubular coating. The fixing member 15a connects the third component 13a, the second component 12a, and the first component 11a together. In this embodiment, the material of the tubular coating is polyester. In other embodiments, the material of the tubular coating is PTFE or other polymer materials.

[0052] Third embodiment

[0053] See also Figure 7 The stent graft 1b provided in the third embodiment is substantially the same as that in the first embodiment, except that in this embodiment, the first component 11b is a developing ring and the second component 12b is a tubular stent graft.

[0054] In this embodiment, the fixing member 15b includes a second reinforcing portion 152b and a connecting portion 150b. The second reinforcing portion 152b is connected to the second winding portion 155b. The connecting portion 150b is connected between the first reinforcing portion 151b and the second reinforcing portion 152b. The first winding portion 154b is connected to the first reinforcing portion 151b. The first winding portion 154b and the second winding portion 155b bind and fix the first component 11b and the second component 12b. The first reinforcing portion 151b binds the first winding portion 154b, and the second reinforcing portion 152b binds the second winding portion 155b. The connecting portion 150b is connected between the first reinforcing portion 151b and the second reinforcing portion 152b. The length of the connecting portion 150b is not limited and can be adjusted according to the distance between the first reinforcing portion 151b and the second reinforcing portion 152b. In this embodiment, the number of connecting portions 150b is multiple. Multiple connecting portions 150b are arranged at intervals. In other embodiments, the number of the connecting portion 150b is one.

[0055] In this embodiment, the first winding portion 154b and the second winding portion 155b are formed by winding only the first portion (not shown) on the first component 11b and the second component 12b. The winding directions of the first winding portion 154b and the second winding portion 155b on the first component 11b and the second component 12b can be the same or different, so as to make the first component 11b and the second component 12b fit tightly and not easy to loosen.

[0056] Fourth embodiment

[0057] See also Figure 8 The stent graft 1d provided in the fourth embodiment is basically the same as that in the first embodiment, except that a through hole 111 is provided in the first component 11d. The inner diameter of the through hole 111 is larger than the diameter of the first part 152d and the second part 153d, and the first part 152d and the second part 153d can pass through the through hole 111. The inner diameter of the through hole 111 is smaller than the distance between the two farthest ends of the fixing part 151d, and the fixing part 151d cannot enter the through hole 111. After the first part 152d and the second part 153d pass through the through hole 111, they are then wound and fixed on the first component 11d and the second component 12d. During the winding process of the first part 152d and the second part 153d, the fixing part 151d is abutted against the outside of the through hole 111, and the fixing part cannot enter the through hole 111 but is tightly abutted against the outside of the through hole 111, so that the position of the fixing part 151d remains unchanged. In this embodiment, the number of through holes 111 is four, and two opposite fixing parts 151d are fixed respectively. In other embodiments, the number of the through holes 111 is not limited, as long as the through holes 111 can limit the position of the fixing portion 151 d .

[0058] Fifth embodiment

[0059] See also Fig. 9 The coated support 1e provided in the fifth embodiment is basically the same as that in the first embodiment, except that the coated support 1e also includes a stabilizing member 17e. The stabilizing member 17e is in the shape of a hollow long strip. The stabilizing member 17e is fixed to the outer wall of the first component 11e. The end of the fixing member 15e passes through the inner wall of the stabilizing member 17e and tightly abuts against the inner wall of the stabilizing member 17e. The stabilizing member 17e fits tightly with 1511e to prevent the end 1511e of the fixing member 15e from loosening. The material of the stabilizing member 17e is not limited to metal, but can also be non-metal.

[0060] Sixth embodiment

[0061] See also Fig.10 The coating support 1f provided in the sixth embodiment is basically the same as that in the first embodiment, except that the first component 11f and the second component 12f are provided with a receiving groove 18f. The receiving groove 18f accommodates the first winding portion 154f and the second winding portion 155f. The first winding portion 154f and the first winding portion 154f abut against the bottom wall and side wall of the receiving groove 18f. The side wall of the receiving groove 18 can limit the position of the first winding portion 154f and the second winding portion 155f to prevent the first winding portion 154f and the second winding portion 155f from shifting and easily loosening. In other embodiments, one of the first component 11f and the second component 12f is provided with a receiving groove 18f.

[0062] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A stent graft, characterized in that: The coated support includes a first component, a second component adjacent to the first component, and a fixing member connected between the first component and the second component, the fixing member includes a first winding portion, a second winding portion, and a first reinforcing portion connected between the first winding portion and the second winding portion, the first winding portion and the second winding portion are wound around the first component and the second component at the same time, the first reinforcing portion clamps the wire thread of the fixing member located inside the first reinforcing portion; the coated support includes a tubular coating, the first component is accommodated in the tubular coating, a part of the second component is arranged outside the tubular coating, and the second component is supported by the fixing member and rotates relative to the first component.

2. The stent graft according to claim 1, characterized in that: The fixing member includes a third winding portion and a second reinforcement portion, the third winding portion and the second winding portion are spaced apart, the second reinforcement portion is connected between the third winding portion and the second winding portion, and the second reinforcement portion presses the first reinforcement portion.

3. In the coated support as described in claim 2, the opening direction of the first reinforcement part is the same as the opening direction of the second reinforcement part.

4. The stent graft according to claim 1, characterized in that: The fixing member includes a second reinforcing portion, the second reinforcing portion is adjacent to the first reinforcing portion, and the opening directions of the first reinforcing portion and the second reinforcing portion are opposite.

5. The stent graft according to any one of claims 1 to 4, characterized in that: The fixing member is formed by winding a ring-shaped coil between the first component and the second component.

6. The stent graft according to claim 1, characterized in that: The fixing member further includes a second reinforcing portion and a connecting portion, the second reinforcing portion is connected to the second winding portion, and the connecting portion is connected between the first reinforcing portion and the second reinforcing portion.

7. The stent graft according to claim 1, characterized in that: The winding method of the first winding part is different from the winding method of the second winding part.

8. The stent graft according to claim 1, characterized in that: The projection of the first reinforcing portion on the radial cross section of the tubular coating falls within the projection of the first component on the radial cross section of the tubular coating.

9. The stent graft according to claim 1, characterized in that: The stent graft further includes a tubular graft, the tubular graft covers the first component, the second component, and the fixing member, and the tubular graft is bonded and connected to the fixing member.

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